Watch-movement.



H'. SANDOZ.

WATCH MOVEMENT.

APPLIOATIONHLBDsnPT.5,1eo1.

Patented May 18, 1909.

WITNEEEEE YHL NCRRIS PETERS CO4, WASHINGTON. .1. C.

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HENRI SANDOZ, 0F TAVANNES, SWITZERLAND, ASSIGNOR TO TAVANNES WATCH CO..OF TAVANNES, BERNE, SWITZERLAND.

WATCH-MOVEMENT.

To @ZZ whom it may concern:

Be it known that I, HENRI SANDOZ, citizen of Switzerland, residing atTavannes, Canton of Berne, Switzerland, have invented a new and usefulVatch-lovement., and I do hereby declare the following to be afull,clear, and exact description of the same.

The present invention consists of a watch movement comprising betweenthe barrel and the pinion of the escapement wheel, a train of gearwheels, no wheel of which passes over or under the barrel nor over orunder the balance, so that all the space available between the supportsof the pivots of these two latter parts may be occupied by these partsthemselves, thereby enabling them to be made of normal size althoughforming part of a movement of very small height.

The accompanying drawing which is given by way of example, represents aconstructional form of the obj ect of the invention in plan in Fig. l,and Fig. 2 is a section on the broken line A-B-C-D*E*FG-H of Fig. l.

The barrel a meshes with a pinion t, the spindle c of which is locatedat the center of t e movement, and carries the minutes wheel d and thecannon wheel e. By this arrangement the usual center wheel, with thepinion and toothed gear in different planes, is done away with. The gearon the periphery of the barrel meshes directly with the center pinion b,with which the wheel 7L engaging, transmits the power to the trainbetween the pinion b and the escapement. The pinion b drives the pinionf of the escapement wheel g by the intermediary of the wheels andpinions h, i, k, Z, m, n and o. As shown in the drawing, no wheel of thetrain of gearing from the pinion b to the pinion f passes over orbeneath the barrel c nor above or below the balance p. This arrangementpresents not only the advantage of enabling a barrel and a balance withits accessory parts, arbors, plate, spiral of normal dimensions to beplaced in a movement of very small height, but also permits ofdismounting and remounting the movement more readily as no gearing issuperposed upon the barrel and the balance and these two parts are thusentirely free.

Specication of Letters Patent.

Application filed September 5, 1907.

Patented May 18, 1909.

Serial No. 391,517.

lt will be seen that by eliminating everything of the central wheelexcept the pinion, l have produced an entirely new construction. By thisl am able to make a watch in which the parts shall be equally as strongas in the ordinary thick watches. By this construction, moreover, a goodclearance is maintained around the balance, and also for the hairspring, so that in changing the position of the watch the latter doesnot come in contact with the barrel or the balance, as is likely tohappenin the ordinary construction of thin watches. ln the ordinary thinwatches there are the same number of parts and similarly arranged as inthe thick ones, the only dii'ference being that the parts are packedcloser together and are made more delicate, with the disadvantages ofimperfect construction. In the ordinary thin watch construction, thebarrel is made exceedingly thin, sometimes being entirely ruined by thebreaking of a mainspring. W hen this barrel is injured it cannot berepaired, but must be replaced by a new one. Against this defectivestructure, my form of wat-ch is of the saine strength as the ordinarythick one, the parts have the same clearance, it is an excellent timekeeper (rarely found with the reduced thick construction) and presentsall the artistic features of the thin watch.

One of the spindles of the train of gear wheels may or may not carry asmall seconds hand. l

The movement represented is for an open face watch, but it will ofcourse be understood that it is equally possible to make it for a doublecased watch, the arrangement of the train of gearing from the pinion bto the escapement, being the same in both cases.

The form and dimensions of the various parts of the movement may vary.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is formed, l declare that what lclaim is :i

l. A strong movement for thin watches, comprising front and back plates,a barrel, a pinion meshing with said barrel, said barrel and the leavesof said pinion extending from front to back plate.

to be per- 2. A strong movement for thin Watches, In testimony whereof,I have signed my comprising front and back plates, a barrel, a name tothis specification in the presence of pinion meshing 'With said barrel,said barrel two subscribing witnesses.

and the leaves of said pinion extending from HENRI SANDOZ. 5 front 'toback plate, in combination with an Witnesses:

escapement train none of Whose Wheels over- ARNOLD ESCOFFEY,

lap either the balance-wheel or the barrel. ALFRED MATHEY-DORET.

